The Growth of Chicks as Affected by Sunlight Through Glass Substitutes

Bethke, R. M.; Kennard, D. C.

doi:10.3382/ps.0060290

Cited by 7 publications

(3 citation statements)

References 2 publications

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“…Much of the discussion of the need of special window glasses for transmitting the 302-range of wave lengths of ultra-violet solar radiation is based upon the observation that common window glass shuts out these rays, which have the property of preventing rickets (49).…”

Section: Glassmentioning

confidence: 99%

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Data on ultra-violet solar radiation and the solarization of window materials

Coblentz¹,

Stair²

1929

BUR. STAN. J. RES.

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In this paper the following topics are discussed: 1. The variation of ultraviolet solar radiation, available for therapeutic purposes, as dependent upon the time of the day, the season of the year, the altitude and geographic latitude of the station, the pollution of the atmosphere by smoke, etc. gfcfr* 1*2 ] Transparency of Window Materials 631 Coblentzl Stair Transparency of Window Materials 633 antirachitic potency. Since, as will be noticed presently, in the wintertime the short wavelength limit of solar radiation is about 305 m/x, it appears that the spectral range of ultraviolet solar radiation, useful for therapeutic purposes in preventing rickets, is only about 5 to 10 m/x in width.

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Section: Glassmentioning

confidence: 99%

“…In this connection it is relevant to cite recent tests by Bethke and Kennard (49) made at Wooster, Ohio (lat. 40°45' N.;…”

Section: How Obtainedmentioning

confidence: 99%

Data on ultra-violet solar radiation and the solarization of window materials

Coblentz¹,

Stair²

1929

BUR. STAN. J. RES.

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“…The figure on the left shows the condition on Jan. 24, 1929; in the center, on Feb. 2,1929, and on the right, on March 22, 1929. received prior to admission to the hospital, with the exception of an increase in the food elements as they gained weight in order to meet their caloric require¬ ments. As could be determined from their histories, none of the infants used in this study had been receiving cod liver oil or any other antirachitic substance.…”

Section: Methodsmentioning

confidence: 99%

Antirachitic Value of Winter Sunlight in the Latitude of 42° 21' (Boston)

Wyman¹

1930

Arch Pediatr Adolesc Med

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Authoritative data show conclusively that irradiation with ultraviolet light is of definite beneficial effect in preventing and in curing rickets. The antirachitic range of the solar spectrum, the wave lengths influencing the deposition of calcium in rickets, is from 290 to 313 millimicrons. That the ultraviolet rays of the sun's spectrum cannot be depended on, however, either to cure or to prevent the development of rickets in all latitudes and at all seasons of the year has also been established, as they vary in intensity during the different seasons of the year, the intensity being highest during the summer months and lowest during the winter months. The ultraviolet rays vary in intensity according to the geographic location, being more intense in the torrid zone than in the temperate zone and at high altitudes than at sea level. The intensity of the short rays is to a large extent dependent on the amount of moisture and dust particles in the air.In the latitude of 42°21' (Boston) under the usual winter condi¬ tions of housing and climate, the direct radiations which reach the growing baby, especially when properly clothed, do not suffice to prevent the development of rickets. On account of the cold and consequent loss of body heat during the winter months, direct exposure of naked infants to the sun's rays is not a practical or safe measure in the prevention or cure of this disease.One of the agents which has received attention in the prevention of rickets in the winter has been the ultraviolet transmitting glass. The types of ultraviolet transmitting glasses which have been more frequently used for this purpose are fused quartz glass, Vitaglass and Helioglass. Window panes made from fused quartz transmit ultraviolet light better than any other known product. The cost of producing it, however,

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The Effect on Bone Formation of Winter Sunlight Transmitted by a Glass Substitute

Russell¹,

Massengale²

1927

Poultry Science

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The Growth of Chicks as Affected by Sunlight Through Glass Substitutes

Cited by 7 publications

References 2 publications

Data on ultra-violet solar radiation and the solarization of window materials

Data on ultra-violet solar radiation and the solarization of window materials

Antirachitic Value of Winter Sunlight in the Latitude of 42° 21' (Boston)

The Effect on Bone Formation of Winter Sunlight Transmitted by a Glass Substitute

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